Best backpack sprayer?


5 year old buck +
I'm looking for a high quality backpack sprayer between 3 and 4 gallons. I'm looking for one with the lever pump so I don't have to take it off my back.

Any recommendations?
Solo seems to get good reviews. I bought one last year and have had no issues or complaints.
Thanks fellas.
I bought a solo last spring. Works real nice.
I have two Solo units, one diaphram and one piston pump. The piston pump gets used probably 15 times a year to spray apple trees. I'm sure there a better and more epensive models out there but Solos work for me.
I've got a lesco piston style. My father in law got me a good deal on it. It's just like a solo. I don't know if Solo makes a crappy product.